Use this when the user names a site that is not in their Inclusify account yet — list_websites does not have it, or a per-website tool answered that no such website exists. This is also the tool that fills in an account registered without a website at all, which /api/agent/start supports and which is a normal state rather than a half-finished signup. WRITES to the account's Inclusify configuration — never to the site itself: registers a domain as a website in the account, on the free plan, and starts nothing. No scan is run, no widget is installed on the site, nothing is charged and no plan is changed. Takes no "website" argument, because the point is that the website does not exist yet. REQUIRES CONFIRMATION: call it first without "confirm" to get a preview naming the exact domain, show that to the user, and only call again with the token once they have agreed — a domain can be registered to one Inclusify account only, so claiming it takes it from anyone else who might. Idempotent: a domain already in this account comes back as a no-op, not an error and not a second website. Refuses rather than guessing when the account has more than one workspace, because a website lands in exactly one and picking wrong hides it. At most 50 websites per account through this tool; the Inclusify panel has no such limit.
